HEX HeroConvert Hex to Decimal
Enter your hexadecimal values below—one per line—and get instant decimal conversions. Whether you're parsing error codes, debugging memory addresses, or interpreting system output, this tool makes it easy to convert hex values back to readable decimal numbers.
How to convert Hexadecimal to Decimal - a step by step tutorial
Understand positional notation and powers of 16. Practice converting A-F digits, calculating place values, and debugging common mistakes in hex-to-decimal conversion.
Getting Started
Identify Hex Digits
Start from the rightmost digit (least significant). Each position represents a power of 16, starting from 160 = 1 on the right.
Convert Letter Digits
Replace hex letters with their decimal values: A=10, B=11, C=12, D=13, E=14, F=15. Numeric digits (0-9) stay the same.
Multiply by Powers of 16
Multiply each digit by 16 raised to its position (rightmost = position 0). Example: For 2A, multiply A (10) by 160 and 2 by 161.
Sum All Values
Add all the results together. Example: 2A hex = (2 × 16) + (10 × 1) = 32 + 10 = 42 decimal.
Common Hex Values in Debugging
Hexadecimal values frequently appear in error codes, memory addresses, and system diagnostics. Understanding these common conversions helps with troubleshooting and technical analysis.
| Hexadecimal | Decimal | Technical Context |
|---|---|---|
| 0x00 | 0 | NULL pointer, empty byte, initialization value |
| 0xFF | 255 | Maximum byte value, error sentinel, bitwise mask |
| 0x100 | 256 | Byte boundary, page size multiple, buffer alignment |
| 0x1000 | 4096 | Memory page size (4KB), common buffer allocation |
| 0x8000 | 32768 | Signed integer boundary, status flag bit |
| 0xFFFF | 65535 | Maximum 16-bit unsigned value, port range limit |
| 0x10000 | 65536 | 64KB boundary, segment size in legacy systems |
| 0xDEADBEEF | 3735928559 | Debug magic number, memory pattern marker |
What is Hexadecimal to Decimal Conversion?
Hexadecimal to decimal conversion transforms base-16 values into standard base-10 numbers. This process is essential for interpreting memory dumps, analyzing error codes, debugging system logs, and understanding low-level data representations.
In technical diagnostics, hexadecimal notation compactly represents binary data. Converting hex to decimal reveals the actual numeric values behind memory addresses (0x7FFF), status codes (0xC0000005), and byte sequences in network packets or file headers.
System administrators, security analysts, and developers frequently decode hex values when troubleshooting crashes (examining stack traces), analyzing malware (inspecting opcodes), or investigating performance issues (reading profiler output). The conversion bridges machine-level representation and human-readable numbers.
Parsing Hex in Code: Developer Examples
Modern programming languages provide built-in functions to parse hexadecimal strings into decimal integers. These are critical for processing user input, network protocols, and configuration files.
JSJavaScript / TypeScript
The second parameter (16) specifies hexadecimal base. Works with or without "0x" prefix.
PYPython
Python's int() with base 16 handles hex parsing. Useful for log file analysis and security tools.
CC Language
Use strtol() for robust parsing or sscanf() for formatted input. Critical in systems programming.
JAVAJava
Integer.parseInt() and Long.parseLong() parse hex strings. Essential for Android debugging.
Why Developers Decode Hex to Decimal
Error Code Analysis
Windows error codes (0xC0000005 = Access Violation), HTTP status codes, and exception numbers appear in hex. Converting to decimal helps cross-reference documentation and Stack Overflow answers.
Memory Address Debugging
Debuggers show pointers and addresses in hex (0x7FFEE4B3C890). Converting to decimal reveals offsets, calculates buffer sizes, and identifies memory layout patterns during crash analysis.
Network Protocol Inspection
Packet captures and network tools display bytes in hex. Converting protocol fields (port 0x1BB = 443 for HTTPS) helps understand traffic patterns and troubleshoot connectivity issues.
Security & Reverse Engineering
Malware analysis, exploit development, and vulnerability research require converting hex opcodes, shellcode bytes, and function addresses to decimal for calculations and memory manipulation.
Color Value Extraction
CSS hex colors (#FF5733) convert to decimal RGB values (255, 87, 51) for image processing libraries, color manipulation algorithms, and graphics API calls that require decimal input.
Hardware Register Values
Embedded systems, IoT devices, and hardware programming involve reading registers in hex (0x3F for configuration). Decimal conversion enables bitwise calculations and threshold comparisons.
Professional Hex Decoder Features
Batch Processing
Paste multiple hex values (one per line) and convert them all instantly. Perfect for log file analysis.
Prefix Detection
Automatically handles 0x prefix, 0X variants, and raw hex strings without manual cleanup.
Large Number Support
Converts hex values beyond 32-bit and 64-bit boundaries for cryptography and big data applications.
Instant Results
Real-time conversion as you type. No waiting, no submission buttons. Immediate feedback for debugging workflows.
Case Insensitive
Accepts both uppercase (0xFF) and lowercase (0xff) hex notation. Works with mixed-case input from different tools.
Error Resilience
Gracefully handles invalid input and provides clear feedback. Continues processing valid values in batch mode.
Understanding Hexadecimal in Technical Systems
Hexadecimal dominates computing because each hex digit precisely represents four binary bits (a nibble). This direct mapping makes hex the preferred notation for memory dumps, machine code, and low-level data structures.
Memory Addressing
64-bit systems use hex addresses like 0x00007FFEE4B3C890. Converting to decimal (140732532107408) reveals the actual memory offset, useful for calculating pointer arithmetic and buffer overflows.
Example: Address 0x1000 = 4096 bytes from base. Next page at 0x2000 = 8192 bytes.
File Format Signatures
File headers use hex magic numbers: PNG files start with 0x89504E47 (2303741511 decimal). Security scanners and forensics tools parse these signatures to identify file types.
JPEG: 0xFFD8FF, ZIP: 0x504B0304, EXE: 0x4D5A (MZ in ASCII)
Database administrators encounter hex in transaction IDs, UUID representations, and checksum values. Converting these to decimal aids in chronological sorting, range queries, and collision analysis.
System profilers and performance tools report metrics in hex (CPU cycles, timestamp counters). Decimal conversion enables statistical analysis, graphing, and comparison against performance benchmarks.
Hex to Decimal: Technical Questions
How do I convert hex to decimal in JavaScript for error codes?
Use parseInt("C0000005", 16) which returns 3221225477. This works for Windows NTSTATUS codes, HRESULT values, and custom error numbers. The second parameter (16) specifies hexadecimal base.
What does 0xDEADBEEF mean in a crash dump?
0xDEADBEEF (3735928559 decimal) is a magic debug constant used to mark uninitialized memory or indicate specific error conditions. When you see this in stack traces or memory dumps, it typically signals a known debug marker rather than random corruption.
Why are memory addresses displayed in hexadecimal?
Hex compresses binary addresses efficiently. A 64-bit address needs 16 hex digits but 20 decimal digits. More importantly, hex reveals byte boundaries (every 2 digits = 1 byte) and alignment patterns (addresses ending in 0 are 16-byte aligned), critical for debugging memory issues.
How to extract RGB values from hex color codes?
For #FF5733: Take pairs (FF, 57, 33) and convert each to decimal (255, 87, 51). In JavaScript: parseInt("FF", 16) = 255 for red channel. Python libraries like Pillow accept decimal RGB tuples for image manipulation.
What's the decimal value of 0xFFFFFFFF?
0xFFFFFFFF = 4294967295 (maximum 32-bit unsigned integer). This appears as -1 in signed 32-bit contexts. Common in bitwise operations, error returns (EOF = -1), and memory pattern fills. Indicates all bits set to 1.
Can negative hex values convert to decimal?
Hex itself isn't inherently negative—it's the interpretation. 0x80000000 could be 2147483648 (unsigned) or -2147483648 (signed 32-bit, two's complement). Context matters: C's strtol() returns signed values, while strtoul() returns unsigned.
Convert hexadecimal numbers to binary numbers.
Convert hexadecimal numbers to octal numbers.
HEX to decimal conversion table.
DECIMAL to hex conversion table.